I'd say it more than likely is jealousy.They have no other reasons to hate her.

I presume you're male? Do you honestly find her attractive??

Well,I don't find her unattractive.She is pretty.

Courtney is beautiful, of course Leatherface is going to be jealous.

..I thought Sophie could be jealous of her but she did say that she had misjudged her because of Courtney's high pitched voice, which I do think would be irritating if she was like that all the time but it just seemed to be the excitement of launch night and I warmed to Sophie after saying that...Courtney stands for everything Carol doesn't like in a female so I don't think for her it's jealousy at all..